OpenVG is a royalty-free, cross-platform API that provides a low-level hardware acceleration interface for vector graphics libraries such as Flash and SVG. Or at least that's how http://www.khronos.org/openvg defines it.
The problem is that there is no Open Source implementation. And the implementation that claims to be the reference implementation is closed. It'ss a rather silly situation, especially given how important vector graphics is becoming on our desktops/mobile devices nowadays.
After this introduction I'm sure you already know that I went ahead and started an Open Source implementation of OpenVG. I did it on top of QtOpenGL. The main reason for it is that QtOpenGL, quality and speed wise (in Qt 4.3) beats everything out there - every vector graphics framework.
So, there's a git repository at: http://gitweb.freedesktop.org/?p=users/zack/openvg.git;a=summary there's an example included, that animates and looks like this:Gears demos are mandatory for any kinds of hardware accelerated API it seems ;) Oh, and due of all the extra features that went in Qt 4.3, Qt snapshots are currently required to compile it.
I'm not sure where this is going to go. It will largely depend on whether there's real interest in it. In general I think it'd be interesting to see KDE have a library that would allow running of OpenVG based content right on KDE. It could be potentially an incredibly powerful feature of KDE as a platform, to support the hardware accelerated vector graphics api.